The heat of vaporization of bromine is 29. 6 kj/mol at its boiling point of 58. 9 °c. What is the change in enthalpy when 12. 0 g br2 condenses at 58. 9 °c?.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

C. chemical changeshope i : )

Ithink its called the coefficent.